123211213011 has 12 divisors (see below), whose sum is σ = 180889322640. Its totient is φ = 80794237680.

The previous prime is 123211213001. The next prime is 123211213031. The reversal of 123211213011 is 110312112321.

It is not a de Polignac number, because 123211213011 - 2⁵ = 123211212979 is a prime.

It is a super-2 number, since 2×123211213011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123211213001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112213671 + ... + 112214768.

It is an arithmetic number, because the mean of its divisors is an integer number (15074110220).

Almost surely, 2^123211213011 is an apocalyptic number.

123211213011 is a deficient number, since it is larger than the sum of its proper divisors (57678109629).

123211213011 is a wasteful number, since it uses less digits than its factorization.

123211213011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224428506 (or 224428503 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 123211213011 its reverse (110312112321), we get a palindrome (233523325332).

The spelling of 123211213011 in words is "one hundred twenty-three billion, two hundred eleven million, two hundred thirteen thousand, eleven".